143 lines
5.0 KiB
C
143 lines
5.0 KiB
C
/****************************************************************************
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* include/nuttx/sensors/lis331dl.h
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*
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* Copyright (C) 2011 Uros Platise. All rights reserved.
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*
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* Authors: Uros Platise <uros.platise@isotel.eu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/** \file
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* \author Uros Platise
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* \brief ST LIS331DL I2C Device Driver
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**/
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#ifndef __INCLUDE_NUTTX_SENSORS_LIS331DL_H
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#define __INCLUDE_NUTTX_SENSORS_LIS331DL_H
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#include <nuttx/i2c.h>
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#include <stdbool.h>
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/************************************************************************************
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* Pre-Processor Declarations
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Data Types
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************************************************************************************/
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struct lis331dl_dev_s;
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struct lis331dl_vector_s {
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int8_t x, y, z;
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};
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/************************************************************************************
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* Public Function Prototypes
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************************************************************************************/
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/** Initialize ST LIS331DL Chip
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*
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* \param i2c I2C Device Structure
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* \param address I2C Address of the proposed device
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* \return Pointer to newly allocated ST LIS331DL structure or NULL on error with errno set.
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*
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* Possible errno as set by this function on error:
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* - ENODEV: When device addressed on given address is not compatible or it is not a LIS331DL
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* - EFAULT: When there is no device at given address.
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* - EBUSY: When device is already addressed by other device driver (not yet supported by low-level driver)
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**/
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EXTERN struct lis331dl_dev_s * lis331dl_init(struct i2c_dev_s * i2c, uint16_t address);
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/** Deinitialize ST LIS331DL Chip
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*
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* \param dev Device to LIS331DL device structure, as returned by the lis331dl_init()
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* \return OK On success
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*
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**/
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EXTERN int lis331dl_deinit(struct lis331dl_dev_s * dev);
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/** Power up device, start conversion */
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EXTERN int lis331dl_powerup(struct lis331dl_dev_s * dev);
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/** Power down device, stop conversion */
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EXTERN int lis331dl_powerdown(struct lis331dl_dev_s * dev);
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/** Configure conversion
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*
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* \param dev Device to LIS331DL device structure
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* \param full When set, range of [-9g, 9g] is selected, otherwise [-2g, +2g]
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* \param fast When set, conversion operates at 400 Hz, otherwise at 100 Hz
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* \return OK on success or errno is set
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**/
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EXTERN int lis331dl_setconversion(struct lis331dl_dev_s * dev, bool full, bool fast);
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/** Get precision
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*
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* \return Precision of 1 LSB in terms of unit [mg]
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**/
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EXTERN int lis331dl_getprecision(struct lis331dl_dev_s * dev);
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/** Get sample rate
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*
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* \return Sample rate in unit of [Hz]
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**/
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EXTERN int lis331dl_getsamplerate(struct lis331dl_dev_s * dev);
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/** Get readings, updates internal data structure
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*
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* \param dev Device to LIS331DL device structure
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* \return Ptr to vector acceleration [x,y,z] on success, or NULL on error with errno set.
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* If data is not yet ready to be read from the LIS331 then errno is set to EAGAIN otherwise
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* errno is set by I2C_TRANSFER().
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*/
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EXTERN const struct lis331dl_vector_s * lis331dl_getreadings(struct lis331dl_dev_s * dev);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __INCLUDE_NUTTX_SENSORS_LIS331DL_H */
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